The reliability of a resilient power system: Service restoration time in reliability analysis

Neglecting service restoration in reliability analyses can lead to overestimation of energy not supplied (ENS) due to contingencies, and subsequently also the associated interruption costs. Estimating accurate interruption costs is of high importance as it serves as input into power system operation and planning. In this paper a method of accounting for service restoration in reliability analysis is proposed. Literature covering restoration strategies is surveyed, and a minimalistic method of modeling service restoration is developed. The method describes the restoration process in a generalizable manner using steady state analysis. The results of the case study indicate that incorporating service restoration in reliability analysis can have a large impact on the estimated annual expected ENS of the system. The developed method can serve as a platform for further work.